A sensitive spectrofluorimetric-FIA (flow injection analysis) method for formaldehyde (HCHO) determination was improved with the aim of analysing seawater samples.The fluorescence emission versus HCHO concentration shows a linear pattern from sub mg L1 to about 1000 mg L1. The reproducibility at 15 ppb level is about 2%. Interferences from other aldehydes were checked; only glyoxal shows a significative interference, but only when its concentration is about 6000 times higher than that of formaldehyde. Superficial (microlayer, just sub-pack or sea-ice free sea surface) and deep (along the water column, sub-pack or in sea-ice free areas) seawater samples were collected near the coast at Terra Nova Bay (Ross Sea, Antarctica) during the 1998/1999 and 2001/2002 Italian Antarctic Expedition. We report here the preliminary results of the spectrofluorimetric-FIA determination of the HCHO content. The mean seawater superficial formaldehyde concentration was 15 mg L1; the concentration along the water column ranged between 4.5 to over 40 mg L1 (20 mg L1 mean concentration), usually with a maximum value for the 30 m depth, corresponding to a fluorescence maximum. The sampling was repeated 7 times in the austral summer in order to evaluate seasonal changes in the formaldehyde concentration/seawater depth profiles. The results show changes in the formaldehyde concentration at different depths.

Formaldehyde determination in seawater. Preliminary application to coastal samples at Terra Nova Bay (Antarctica) / O. LARGIUNI; S. BECAGLI; M. INNOCENTI; A.M. STORTINI; R. TRAVERSI; R. UDISTI. - In: JOURNAL OF ENVIRONMENTAL MONITORING. - ISSN 1464-0333. - STAMPA. - 7(12):(2005), pp. 1299-1304. [10.1039/b507334k]

Formaldehyde determination in seawater. Preliminary application to coastal samples at Terra Nova Bay (Antarctica)

BECAGLI, SILVIA;INNOCENTI, MASSIMO;TRAVERSI, RITA;UDISTI, ROBERTO
2005

Abstract

A sensitive spectrofluorimetric-FIA (flow injection analysis) method for formaldehyde (HCHO) determination was improved with the aim of analysing seawater samples.The fluorescence emission versus HCHO concentration shows a linear pattern from sub mg L1 to about 1000 mg L1. The reproducibility at 15 ppb level is about 2%. Interferences from other aldehydes were checked; only glyoxal shows a significative interference, but only when its concentration is about 6000 times higher than that of formaldehyde. Superficial (microlayer, just sub-pack or sea-ice free sea surface) and deep (along the water column, sub-pack or in sea-ice free areas) seawater samples were collected near the coast at Terra Nova Bay (Ross Sea, Antarctica) during the 1998/1999 and 2001/2002 Italian Antarctic Expedition. We report here the preliminary results of the spectrofluorimetric-FIA determination of the HCHO content. The mean seawater superficial formaldehyde concentration was 15 mg L1; the concentration along the water column ranged between 4.5 to over 40 mg L1 (20 mg L1 mean concentration), usually with a maximum value for the 30 m depth, corresponding to a fluorescence maximum. The sampling was repeated 7 times in the austral summer in order to evaluate seasonal changes in the formaldehyde concentration/seawater depth profiles. The results show changes in the formaldehyde concentration at different depths.
2005
7(12)
1299
1304
O. LARGIUNI; S. BECAGLI; M. INNOCENTI; A.M. STORTINI; R. TRAVERSI; R. UDISTI
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Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/217746
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